<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
  <head>
    <title>CSS Test: left:auto offset of position:fixed box in a position:relative containing block</title>
    <link rel="author" title="Chris Rebert" href="http://chrisrebert.com" />
    <link rel="reviewer" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" />  <!-- 2015-09-17 -->
    <link rel="help" href="http://www.w3.org/TR/CSS21/visuren.html#position-props" title="9.3.2 Box offsets: 'top', 'right', 'bottom', 'left'" />
    <link rel="help" href="http://www.w3.org/TR/CSS21/visudet.html#abs-non-replaced-width" title="10.3.7 Absolutely positioned, non-replaced elements" />
    <link rel="help" href="https://drafts.csswg.org/css2/visuren.html#position-props" />
    <link rel="help" href="https://drafts.csswg.org/css2/visudet.html#abs-non-replaced-width" />
    <link rel="match" href="left-offset-position-fixed-001-ref.xht" />
    <meta name="flags" content="" />
    <meta name="assert" content="The 'left' box offset property, for fixed positioning, when set to 'auto' specifies the offset of the box from its 'static-position containing block'. Here, in this test, the 'static-position containing block' is #shifted-column and the containing block for #red is established by the viewport." />
    <style type="text/css">
#shifted-column {
    left: 50%;
    width: 50%;
    position: relative;
}
.square {
  width: 100px;
  height: 100px;
}
#red {
  background-color: red;
  position: fixed;
  left: auto;
}
#green {
  background-color: green;
  position: absolute;
  left: 50%;
}
    </style>
  </head>
  <body>
    <p>Test passes if there is a solid green square and <strong>no red</strong>.</p>

    <div id="shifted-column">
      <div id="red" class="square"></div>
    </div>
    <div id="green" class="square"></div>
  </body>
</html>
